Check-valve.



H. W. MASSBY.

CHECK VALVE.

APPLIGATION FILM) snmus, 1911.

1 ,077,41 5. Patented Nov. 4; 1913.

WJTNESSES.- [Nl/ENTOR PATENT OFFICE.

W. UIASSEY, OF BESSEMER, ALABAMA.

casca-VALVE.

specification. or Letters Patent.

Patented N0v.4,1913.

Application med september'a, tati. Aserial No. 643,522.

To all whom, t may concern.'

Beit known that I, HARRY W. Mesem', a citizen of the United States of America, residing at Bessemer, in the county of Jefferson and State of Alabama5 have invented certain new and useful li-nprovenients in Check-Valves, of which the following is Va r specification.

My invention relatos to an improvement in check valve-fittings and has for its object designed that it will operate equally welt in all positions and will not become stuck. and that has its life materially prolonged by reason of the fact that the valve seat can 'i be continually cut down without weakening the casing or causing any tendency on lthe i to maintain casing` sections accurately cen- .part of the valve to stick as its seat wears.

A further Object of my invention is to design the valve itting s'o that its casing parts can be readily and independently con.- n

nected and disconnected from the pipe lino andv which are so connected together' as to :permit the pipe line to be adjusted or tightcned up by merely loosening up the connections between the secti ons 'of the valve casing without detaching same. I prefer to use a union coupling for `the smaller valve fittings such as canv be readily handled hy the aver-A age wrench, but for larger fittings l prefer to use a circular ground seat joint with de tachable bolt connections which permit the casing sections to be relatively adjusted and quickly connected in different adjusted posi'- tions. Y

Another important feature of my invention 'resides in the means utilized to prevent the valve sticking, which consists in provid ing the valve with a Hat seat surrounded by a channel or groove so as to be overhung by the outer edge of 'the valve face, thus preventing the formation of a taper inthe valve seat which is likely to cause the valve to stick or hang. l provide the casing with sufficient stock to enable the seat to be ma chined down to increase the life of the titting, the groove or channel being main i tained.

My improved valve proper comprises an integral structure formed with oppositel)v disposed central projections on its top and bottom faces which coperate with spiders`r carried by each casing sections, to guide and stop the valve.

A further important feat ure of my inven tion Consists in providing the disk valve with a raised flattened valve face so that in machining the valve it can he cut down without weakening theJ valve, the additional stock provided for this purpose greatly increasing the life of the valve and the number of tintes it can be machined down.

j )i further feature is the material strengthening of the dish-shaped disk valve by giving an increased amount of stock in the hubs troni which the guide stems are turnedi down.

A further advantage in connection with the flanged type of two-part valve casing consists in forming the scat in a raised annular iiange to give additional stock in the valve scat and to leave around it a positioning groove forthe other section of the casing *tt-red without respect to the other means of connecting same.

As illustrative of the preferred embodiments of my invention, reference is made to the accompanying drawings, in which2- Figure l is a vertical sectional elevation. through my improved check valve fitting. Fig 2 is a half plan view of Fig. 1, and Fig. 3 is a vertical sectional view )through the smaller style of fitting in which the casing sections are joined by a union coupling.

Similar reference numerals refer to similar parts throughout the drawings.

As illustrated in Fig. 1, the valve casing comprises two sections l and 2, each having at its end an octagonal nut 3 surrounding a threaded opening 4 into which the pipe is adapted to be screwed. Each section is also provided with a spider 5 which is preferably cast integral with the .casing section and is provided with a central hub porof which the section l malies a close turning tit. The seat 10 1s disposed 1n the casing and is adapted to. receive the checkv valve ll, which is shown in the form of a low with integral projections having off-set lshoulders l2 and 13 and cylindrical guide t extensions 14 and 15., which'latter make a Leidse` sliding tit in the openings 7, while circular disk valve provided-ab0ve and be-k eol annular .alve seat ll() over the outer edge c the shoulder 12 will engage the upper spider 5 and serve as a stop to limit the up travel of the valve.

The valve has a raised annular valve face 11a surrounding its periphery, the raising of the valve face givin additional stock in the valve to permit t e face to be machined down to a considerable extent without weakening the valve. Further, the shoulders 12 and 13'so effectively reinforce the disk valve as to prevent any uneven wearing of the face or any tendency of the face to become channeled by the flexing of the valve in action.

,The flanges 8 'and 9- of the casing sections are provided with a series of bolt holes 16 and th'ecasing is adapted to be joined toether by threaded bolts 17 and nuts 18.

he seat 10 is provided with an annular groove 19 in itsface so positioned as to be overhung by the outer edgc of the flat valve face ofvalve 11 and it will be noted that the groove is set `in from the outer edge of the seat and wall 20 of section 2 which is given ample stock to permit the seat to be turned down until it' comes to a level "with the spider 5 without affecting the operation of the valv, or weakening the casing. In turning down the seat the"groove 19 is maintained to` give the oil-set flat valve seat and the manner of operation ofthe valve is unchanged, and in like "manner the off-set valve 'face may be turned down to a, considerable extent withoutl weakening the valve, so that the life ofthe fitting Iis very materially increased. The len -h of the guide 14 is' suflicient4 to provi e Ifor this change in position of the seat as it is turned down. The shoulder 13 may be turned down when necessary to permit the ,valve to. properly engage its lowered seat. 7

In F1 3, I show the valve 11y disposed in a`cas1ng formed by a fitting-section 21 externally threaded and in threaded engagement with a union coupling 22 lwhich yis flanged at 23 to engage a flange 24 onthe casing section. 25. Suitable packing 26` is interposed between the meeting faces of,`

the sections 21 and 25, which are thus adjustably coupled by a. union instead of the bolt connections shown in Fig. 1.

In practice the valve .is v inserted betweeny sections 1 and 2 which ajrekthen screwedy onto the threaded ends 'of' the pipeline and are turned until their bolt holes 16 are broughtintoregister, when the sections arey` joined togetherby the-bolts 17, the casing section 1 being accurately centered by its close fit around the shoulder 10 which car-V ries the valve seat. When it is. desired tfo tighten up the pipe line the boltsare removed and either or both sections of the pipe line may be tightened up until the bolt holes in sections l and 2 again register, thus avoiding taking oil tl'ie,-valve casing and permitting either section of the valve casing to be unscrewed, tightened orreplaced independently of the other` The same advantages of o eration may be obtained from the use o the union ,coupling as seen in Fig. 3.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a check valve-fitting, in combination, a sectional casing having as an integral part thereof an internally offset shoulder which' has its upper face machined to form a fiat' termediate plane, each section having a guide for the checkl valve, and one section having an integral enlargement forming a valve seat which is purposely given'extra size to ermit it to be machined down without wea ening it or the casing section, the exposed' end face of said seat being machined to form a raised flat valve seat surrounded by a channel or groove, means to detachably connect the cas Ing sections together, a check valve mounted on said casin and having guide stems which work in ,sain guides, said valve having its peripheryv purnoselvfthickened to give additional stock for its valve face which can be machined down without weakening the valve, and saidl valve having a flat valve face adapted to enga e said raised valve seat and overhang said c annel or groove.

3. A check valve-fitting comprising two casing sections, means to connect said sections, a spider in each section havingcentral alining openings, a ldisk disposed between saidspiders and having a, raised Hat valve [face and centrally disposed guide stems -the other casing section to center t e sections", said seat being formed of additional stock which isremovable without weakening the casing and having about its inner marginal edge a flat surface forming a valve seat which is raised so that the outer edge of the face of the valve is free of engagement with they seat, when the valve is seated.

4. A check valve-fitting comprising two casing sections having machined annular ianges which engage, means to detachably connect said Hanges, a spider in each section having central alining openings, a disk valve disposed between said spiders and havin ,centrally disposed guide stems which wor insaid spider openings, and a seat for the valve carried by one of the sections and formed by an annular shoulder which rises above the machined surface of the flange on its respective casing section and has its outer side wall turned to make a close turning fit in the other casing section to center the sections, said seat being formed of additional stock which is removable without weakening the casing and having a flat surface off-set so the outer ed e of the face of the valve 15 HARRY W. MASSEY.

Witnesses I NOMIE WELSH, R. D. JOHNSTON, Jr. 

